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2002
Journal Article
Titel
Diffraction properties of ordered arrays of large latex particles
Abstract
Ordered monolayer and multilayer films of monodisperse 0.2-6 mu m latex particles were manufactured using different preparation techniques: Langmuir-Schafer deposition, natural sedimentation, slow drying in high humidity atmosphere, flow cell and vertical deposition. The structures of the films were investigated. Diffraction properties were studied using a laser beam as a probe and by the diffraction optical microscopy with Bertrand lens. For the first time, the stop-bands were observed in the NIR region up to 3200 nm in the reflectance spectra. The array quality is confirmed by the observation of Fabry-Perot fringes in the vicinity of the main Bragg peak. The size of ordered area was estimated by microscope spectroscopy and 2-D fast Fourier transformation (2D-FFT) of optical microscopic pictures.
Author(s)
Tags
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large latex particle
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ordered array
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ordered monolayer
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multilayer film
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monodisperse latex particle
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preparation technique
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Langmuir-Schafer deposition
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natural sedimentation
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slow drying
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high humidity atmosphere
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flow cell deposition
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vertical deposition
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structures
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diffraction properties
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laser beam probe
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diffraction optical microscopy
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Bertrand lens
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stop-band
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NIR region
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reflectance spectra
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array quality
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Fabry-Perot fringes
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main Bragg peak
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ordered area size
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microscope spectroscopy
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2D fast Fourier transformation
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optical microscopic picture
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visible reflection spectra
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photonic crystal
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0.2 to 6 micron